The ProRep reptile 100mm vivarium locks are essential security for your reptiles home. There are various reasons for having a lock on your vivarium door: It prevents the animal pushing the door open. Prevents you accidentally opening the door. Helps you get into the routine of carefully shutting the door so it is not left ajar. The ProRep locks are designed to work on any vivarium with sliding glass doors. The key different option will have a different key each time. This is a good option for people with a large collection but if one animal is more dangerous so you wish to restrict access. It is also suitable for more expensive individuals as other people will not have the same key.The ProRep reptile 100mm vivarium locks are essential security for your reptiles home. There are various reasons for having a lock on your vivarium door: It prevents the animal pushing the door open. Prevents you accidentally opening the door. Helps you get into the routine of carefully shutting the door so it is not left ajar. The ProRep locks are designed to work on any vivarium with sliding glass doors. The key different option will have a different key each time. This is a good option for people with a large collection but if one animal is more dangerous so you wish to restrict access. It is also suitable for more expensive individuals as other people will not have the same key.